Roof.



FI. W. BURNETT.

ROOF. APPLICATION FILED MAR. 25, 1912 1,170,219. Patented Feb.1,1916. y I I :L /gif A RICHARD'WEBB BUBNETT, OF MONTREAL, QUEIBEIG,y CANADA.

ROOF.

Specification of Letters Patent.

i Patented Feb.. 1, 1916.

Application tiled March 25, 1912'. Serial No. 686,105.

To all 'whom z't may concern i Be it known that I, RICHARD WEBB BUR- NETT, of the city of Montreal, Province of Quebec, Dominion of Canada, have invented certain new and useful Improvements in Roofs; and I do hereby declare that the following is a full, clear, and exact description theregf.

My invention relates to all metal car roofs and it has for its object to provide a roof of this type affording facility for ventilation and less liability to buckle and bulge when walked upon. l

To this end the invention may be said briefly to consist of a roof comprising roof sheets with upwardly offset overlapping edges inclosed by carlines of inverted U cross-section, the edges of the sheets being either self-sustaining or supported by bridges secured to the interior of the legs of the carline by means clamping the overlapping portions to the bridges.

Other elements of the invention consist in structural features by which the carlines tightly inclose the portions of the sheets contiguous to their edges and thus eliminate vertical play between the sheets and car` lines, and the side plates and ends of the carlines are conjointly formed to afford effective Ventilating means without danger of cinders and dust entering, while the ends of the sheets extend down over theside-plates and are stifi'ened in order to prevent them from springing out from the side plates between the carhnes.

For full comprehension. however, of the invention reference must be had to the accompanying drawings forming a part of this specification in which similar reference characters indicate the same part, and wherein:

Figure l is a side elevation of a ortioniof a roof containing my invention; ig. 2 'is a transverse sectional view taken on line A A Fig. 1; Fig. 3 is a similar view to Fig. 2 with the carline roof-sheet and side plate slightly separated to illustrate the relative configu ration of the carlines and sheets; Fig. 4 is a vertical sectional view transversely to the carline on line B B and drawn to an enlarged scale; Fi f. 5 is a vertical sectional view on line C Fig. 4 with the clamping means in elevation; and Figs. 6 and 7 are similar views to Figs. 4 and 5 of a modifica- 5 tion.

The roof-sheets are indicated at b, the carlines at c, and the side plates at d, the side plates being bolted to. the side timbers e of the car in any way preferred by the car builder and therefore not shown. The roofsheets have their sidel edges upwardlyoflset and correspondingly curved as atj and overlapped within the 'carlines which are of flanged inverted U-form in cross-section, the flanges being indicated at g. The side plates are of Z cross-section and the ends of the roof-sheets are bent down over them, the corners being sheared od as at l1. to clear rivets i by which the ends of the flanges of the carlines are fastened to the side plates.

The carlines and roofssheets are upwardly curved as shownl in Fig. 2 and in order te 'increase the reinforcing qualities of the carlines relatively to the sheets the curve of the former is at a slightly wider radius than the carlines. IThe eect is that the sheets being laid in place rst when the carlines are lowered over them the portions of the sheets contiguous to the upwardly odset edges are more or less crowded into the concavity of the carline-tlanges and when the ends of the latter are riveted to ythe side i plates there is absolutely no vertical play etween the sheets and carlines. This is important in preventin depression of the roof-sheets when walke upon at one side of the middle, the depression being impossible without upwardl bulging on the other side of the middle w ich the lack of lay and snug litv and rigidity of the car ines prevent. This feature is clearly illustrated by Figs. 2 and 3.

Ventilation is a'orded by apertures in the ends of the carlines, and cinders, dust and snow are prevented from being blown into the apertures by providing openings j in the outside horizontal ila, la of the side plates in position registerng with the interior of the carlines. A These apertures' are formed b' cutting away the head and legs of the of the carlines as at fv, the flanges thereof extending down to and resting at their ends upon the flanges I: as shown in Fi 1 and 2.

When using lightweight roofsheets II side horizontal flange ofthe side plate and through the straps,

such bars being brought and held in clamping relation with the bridging straps by tae'ed split keys s driven into a slot t in the o t.

ln order to prevent ingress of cinders, dust and snow between the turned down ends of the sheets between the carlines and the side plates the sheets are formed with a bead u adjacent and parallel to the edge. rlFhe bead stiens the edge of the sheet and prevents it from springing away from the side plate even if not otherwise held. rllhe sheets are preferably corrugated at wide intervals.

What l claim is as follows:-

1. 1n a car roof, the combination with carlines of inverted U-orm, of roof-sheets having overlapping upwardly offset side edges enveloped by the carlines.

2. ln a car roof, the combination with carlines of inverted U-orm, of roof-sheets having overlapping upwardly odset side edges enveloped by the carlines and means fastening the said edges of the sheets within the carlines. Y

3. ln a car roof, the'combination with carlines of inverted Udorm, of roof-sheets having overlapping upwardly odset sideedges enveloped by the carlines, bridging straps riveted at their ends to the interior of the legs of the carline, clampin bars beneath the overlapping edges an bolts extending downwardly through the straps, sheet edges and bars, and clamping devices carried by the protruding ends of the bolts.

4. 1n a car roof, the combination with carlines of inverted U-forrn, of roof-sheets having overlapping upwardly odset correspondingly curved side edges enveloped by the carlines.

5. In a car roof, the combination with carlines of inverted U-orm, of roof-sheets having overlapping upwardly odset correspondmgly curved side edges enveloped by t e carlines, bridging straps riveted at their ends to the inter1or of the legs of the carline, clamping bars beneath the overlapping edges and bolts extending downwardly sheet edges and bars,

, and clamping devices carried by the protruding ends of the bolts. l

-6. In a car roof the combination with side plates of reversed-Z cross-section, and a car' line of inverted U-crosssectien with its ends turned down and supported upon the out-v ha'vnIg, a Ventilating aperture therein.

7. n a car :root` the combination with ,side

'Plates Of reversed-Z cross-section and a carline of inverted U-cross-section with its ends turned down and supported upon the outsidehorizontal lange of the side plate and having a portion of its lower edge disposed in an Ioblique plane.

8. In a car roof the combination with side plates of reversed-Z cross-section, and a carturned down and supported upon the outside horizontal tlange of the side plate and having a Ventilating aperture therein, the said horizontal dange having an opening communicating with the interior of the carline.

10. ln a car roof the combination with side plates of reversed-Z cross-section, and a carline of inverted U-cross-section with its ends turned down and supported upon the outside horizontal flange of the side plate and having a portion of its lower edge disposed in an oblique plane the said horizontal ange having an opening communicating with the interior of the carline.

11. lin an all metal car roof, an upwardly curved carline, and an upwardly curved roof sheet, the radius of curvature of the carline being greater than that of the root sheet.

12. ln a car'roof, the combination with relatively movable load-sustaining roong sheets having flanged edges, extending over and weather-prooiing the flanged edges of said sheets, and means suspended from said carline and located above the plane of the sheets for supporting the same and permitting the relative movement.

13. ln a car roof, the combination with side plates of relatively-movable load-sustaining roofing sheets extending across between said side plates and having flanged adjacent edges, a load-sustaining carline secured to said plates intermediate said sheets extending over and weather-proofing thle flanged edges thereof, and means suspended from said carline for supporting said sheet intermediate said plates, said means being` located above the plane of the sheets.

14. lin a car roof, the combination with side plates, of a carline extendingacross between said side plates and secured thereto, relatively movable load-sustaining roong of a carline lll@ sheets arranged upon.opposite sides of Said 1carline and having flanged edges extending iapping roof sheets having anges at adjacent edges enveopedby the carlines, and

means for supporting said roof sheets positioned Wholly above the piane of the unl@ porting said oof sheets engaging the o'set portion of said roof sheets above the plane of the main portion of said roof sheets.

n testimony whereof have signed my name to this specification in the presence of two witnesses.

mennen wenn BURNETT.

Witnesses:

IE. R. Pins, GORDON G. Geom. 

